期刊
PHYSICAL REVIEW LETTERS
卷 115, 期 13, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.115.136804
关键词
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资金
- NBRPC [2012CB921301, 2014CB920901]
- NSF [DMR-1207562, DMR-1508644]
- DOE [DE-FG02-06ER46274, DE-SC0006671]
- NBRPC [2012CB921301, 2014CB920901]
- NSF [DMR-1207562, DMR-1508644]
- DOE [DE-FG02-06ER46274, DE-SC0006671]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1508644] Funding Source: National Science Foundation
- U.S. Department of Energy (DOE) [DE-SC0006671, DE-FG02-06ER46274] Funding Source: U.S. Department of Energy (DOE)
We report on the observation of a helical Luttinger liquid in the edge of an InAs/GaSb quantum spin Hall insulator, which shows characteristic suppression of conductance at low temperature and low bias voltage. Moreover, the conductance shows power-law behavior as a function of temperature and bias voltage. The results underscore the strong electron-electron interaction effect in transport of InAs/GaSb edge states. Because of the fact that the Fermi velocity of the edge modes is controlled by gates, the Luttinger parameter can be fine tuned. Realization of a tunable Luttinger liquid offers a one-dimensional model system for future studies of predicted correlation effects.
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